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→Analysis Approach
This procedure is repeated with the LED and/or SiPM covered to measure the dark rate. Depending on which distribution showed the photon peaks more distinctly, either the illuminated or dark datasets were used for the gain calculation and pedestal calculation. Either way, a mean was extracted from the dark distribution to calculate the dark rate and to subtract the average dark pixel count measured from the average pixel count measured while illuminated.
This procedure is repeated with the LED and/or SiPM covered to measure the dark rate. Depending on which distribution showed the photon peaks more distinctly, either the illuminated or dark datasets were used for the gain calculation and pedestal calculation. Either way, a mean was extracted from the dark distribution to calculate the dark rate and to subtract the average dark pixel count measured from the average pixel count measured while illuminated.
Efficiency calculated in the manner described is compared to the expected efficiency. Integrating the HPD response function in the frequency space weighted by the LED emission spectrum yields the mean detection efficiency of the HPD for that light source. Doing the same with the manufacturer-supplied response function of the SiPM and comparing to the figure for the HPD yields the expected SiPM efficiency relative to the HPD.
=== Summary of Basic Characteristics and Comparison of SiPMs ===
=== Summary of Basic Characteristics and Comparison of SiPMs ===